Total charge of universe must be zero . Since the amount of positive charge is exactly equal to the negative charge ,in the whole universe hence their sum should be zero . Or we can say that our universe is neutral. read more
If the universe is infinite, and has a uniform nonzero charge density through its infinite expanse, then it has an infinite net charge. Then every part of the universe is a source of some never-ending electric field lines. read more
Of course, this doesn't mean that our universe is exactly electrically neutral. But it does say that any deviations from that are minuscule indeed, and if they exist, are likely due to where exactly you draw the boundary to our universe. read more